Abstract
Aims
Desert characterized by alkaline soil with low organic matter and nutrients has a high soil oxidative potential. We hypothesized that oxidase activities would recover faster than hydrolases during the succession of sand-fixing community.
Methods
Sand dunes stabilized in different years, including a moving sand dune and a steppe at the southeastern fringe of the Tengger Desert, were selected to investigate restoration of extracellular enzyme activities (EEAs) in a 50-year chronosequence.
Results
Oxidases showed significantly higher activities than hydrolases at all ten studied sites and EEAs exibited a decreasing trend from catalase, phenol oxidase, sucrase, urease, alkaline phosphatase, α-Amylase to cellulase. After 50 years of revegetation, most EEAs in topsoil recovered to 50–83% of that of the steppe except for urease. Oxidase activities recovered earlier and faster than hydrolases, while hydrolases activities attained the fastest recovery at 19–25 years in the 50-year chronosequence.
Conclusions
Recovery of EEAs was modulated by the succession of the sand-fixed community: oxidases activities exhibited peak recovery rates at the stage when shrubs dominated the community, while recovery of hydrolases activities appeared to be mainly regulated by biological soil crusts and annual plants.
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Abbreviations
- EEAs:
-
Extracellular enzyme activities
- BSCs:
-
Biological soil crusts
- MSD:
-
Moving sand dunes
- SFD:
-
Sand-fixed dunes
- H90:
-
Hallow of sand-fixed dunes revegetated in 1990
- W87:
-
Windward of sand-fixed dunes revegetated in 1987
- L81:
-
Leeward of sand-fixed dunes revegetated in 1981
- W81:
-
Windward of sand-fixed dunes revegetated in 1981
- C64:
-
Crest of sand-fixed dunes revegetated in 1964
- W64:
-
Windward of sand-fixed dunes revegetated in 1964
- C56:
-
Crest of sand-fixed dunes revegetated in 1956
- W56:
-
Windward of sand-fixed dunes revegetated in 1956
- REF:
-
Reference steppe site north-facing slope
- CAT:
-
Catalase
- PHO:
-
Phenol oxidase
- SUC:
-
Sucrase
- URE:
-
Urease
- ALP:
-
Alkaline phosphohydrolase
- AMY:
-
α-amylase
- CEL:
-
Cellulase
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Acknowledgements
This research was financially supported by the Innovation Project from the Chinese Academy of Sciences (KZCX2-EW-301-3) and the Chinese National Natural Sciences Foundation (Grant No. 40971033 and 31170385). We appreciate Prof. Shiping Wang for reviewing the manuscript. We thank Dr. Hans Lambers and two anonymous reviewers for valuable comments that greatly improved the presentation of this manuscript.
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Zhang, ZS., Dong, XJ., Liu, YB. et al. Soil oxidases recovered faster than hydrolases in a 50-year chronosequence of desert revegetation. Plant Soil 358, 275–287 (2012). https://doi.org/10.1007/s11104-012-1162-2
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DOI: https://doi.org/10.1007/s11104-012-1162-2